javascript - 需要功能帮助处理此数据结构

Question

我有这个数据结构:

let questions=[{
    question: "What is your name?",
    responses: [{
        userId: 1,
        answer: "Geof"
    }, {
        userId: 5,
        answer: "Pete"
    }]
}, {
    question: "Where are you from?",
    responses: [{
        userId: 3,
        answer: "Earth"
    }, {
        userId: 5,
        answer: "Mars"
    }]
},.......]

我想将这个对象传播到:

[{ userId: 1, "What is your name?": "geoff", "Where are you from?":"", "another question":....}, 
{ userId: 2, "What is your name?": "", "Where are you from?":"".......}

由于我无法预测我会收到哪些问题，所以我正在寻找一个以这种方式传播问题的动态函数。非常欢迎使用 lodash 的解决方案。

Answer 1

let questions=[{
    question: "What is your name?",
    responses: [{
        userId: 1,
        answer: "Geof"
    }, {
        userId: 5,
        answer: "Pete"
    }]
}, {
    question: "Where are you from?",
    responses: [{
        userId: 3,
        answer: "Earth"
    }, {
        userId: 5,
        answer: "Mars"
    }]
}]

var responses = {}
questions.forEach(q => q.responses.forEach(res => (responses[res.userId] = responses[res.userId] || {})[q.question] = res.answer))
console.log(responses)

//If you really want it as array :

var arr = [];
for (var userId in responses) {
    responses[userId].userId = userId;
    arr.push(responses[userId]);
}

console.log(arr)

请注意，这不会存储诸如“你叫什么名字？”:“”之类的内容，但这是不必要的，您可以使用 hasOwnProperty 检查用户是否回答了该问题